ZF 4661.172.013 COUPLING for WG 90/WG 94 | OEM Genuine Part

Overview

The ZF 4661.172.013 COUPLING is a critical driveline component engineered for the WG 90 and WG 94 series transmissions. This OEM genuine part serves as the primary torque transfer interface between the engine output and the transmission input shaft, ensuring smooth power delivery and torsional vibration dampening. The SKU 4661.172.013 is precision-machined to ZF’s exacting tolerances, designed to withstand high cyclic loads in heavy-duty industrial applications. Positioned directly within the bell housing assembly, this coupling works in concert with the 4661101033 HOUSING and the 4661301096 HOUSING to maintain proper alignment and sealing integrity.

Symptoms of Failure

• Transmission shudder during acceleration: A worn 4661.172.013 coupling often produces a pronounced vibration or shudder when the vehicle is under load, particularly between 1200-1800 RPM.
• Oil seepage at the bell housing joint: Deterioration of the coupling’s sealing surface leads to transmission fluid leaks, often visible as drips near the engine-transmission interface.
• Abnormal gear engagement noise: As the coupling loses its damping capacity, operators may hear a distinct clunking or metallic chatter when shifting between forward and reverse gears.
• Reduced torque transfer efficiency: A fatigued coupling can cause intermittent power loss, especially during hill climbs or heavy hauling operations.

Technical Specifications

Compatibility

This coupling is specifically designed for the ZF WG 94 series transmissions, with verified fitment across the WG 180, WG 200, and WG 210 models. It also serves as a direct replacement in earlier WG 90 series units. When servicing these transmissions, technicians commonly replace the 4656183202 LOOSE PARTS kit simultaneously, as these components share wear surfaces. Additionally, the 6073003014 CONTROL UNIT should be inspected for proper calibration when the coupling is replaced, as driveline vibrations can affect electronic shift logic.

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